IPCC TAR and the hockey stick

A must read if you still think the IPCC and Hockey Stick Graph have any worth.

JC comments:  Christy’s assessment, when combined with the UEA emails, provides substantial insight into how this hockey stick travesty occurred.  My main unanswered question is:  How did Michael Mann become a Lead Author on the TAR?  He received his Ph.D. in 1998, and presumably he was nominated or selected before the ink was dry on his Ph.D.  It is my suspicion that the U.S. did not nominate Mann (why would they nominate someone for this chapter without a Ph.D.?)  Here is the only thing I can find on the U.S. nomination process [link].  Instead, I suspect that the IPCC Bureau selected Mann; it seems that someone (John Houghton?) was enamored of the hockey stick and wanted to see it featured prominently in the TAR.  The actual selection of Lead Authors by the IPCC Bureau is indeed a mysterious process.

The IPCC process is clearly broken, and I don’t see anything in their recent policies that addresses the problems that Christy raises.  The policy makers clearly wrought havoc in context of the AR5 WG3 report; however there is a more insidious problem particularly with the WG1 scientists in terms of conflict of interest and the IPCC Bureau in terms of stacking the deck to produce the results that they want.

Read the whole essay here:
IPCC TAR and the hockey stick.

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